He tweeted (May 13): "There is now nipple marks on our car..Sweden is always fun."

The lads also confirmed that they are writing their own material and member Horan admitted that everything is going well creatively, and they have even started to lay down some vocals:

"sitting writing a song with @louis_tomlinson ,@harry_styles and @real_liam_payne while @zaynmalik is in booth recording his bit on a tuuuune."

Louis Tomlinson also took to Twitter to thank the group's fans for being so excited at the prospect of new songs and wrote: "Just seen the trends. Thank you so much, can't wait for you guys to hear our new stuff!!"

Watch One Direction's newly unveiled music video for 'More Than This' below: